The approach used was not powerfull enough to deal with things like

nested groups or the laser mail routing draft.  Mostly, this is
because a flag saying the attribute type is 'final' is not flexible
enough.  The old 'final' flag is gone and replaced by a priority
level.

Change 'forward' to 'route' to be consistent with the laser wording.

Add new 'domain' spec in the configuration file to describe what are
the local domains so that we do not loop when doing the laser thing.

We were escaping asterisks in filters.  This seems incorrect.  Removed.